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In this study, Nantou County LTK mountains, and Taichung District Tachiachi mountain valley of the Collapse (Silt) soil sampling, and the Nantou County Wushe reservoir sampling of the soil reservoir sedimentation, in different water-cement ratio and age for each project mechanical test. According to their comprehensive comparative analysis of the results from this study, indicate that using collapse (silt) fill in the non-standard concrete water-cement ratio of 0.5, 1.0 and 1.5, its age of 28 days compressive were up to standard concrete strength of 10% ~ 66% (30.7kg/cm2 ~ 193.6kg/cm2) (Renai Township colluvium group), 15% ~ 89% (62.8kg/cm2 ~ 368.7kg/cm2) (Gu Customs colluvium group) and 11% ~ 85% (49.8kg/cm2 ~ 388.7kg/cm2) (Renai Township alluvial soil group).
The study concluded that the use of natural collapse (silt) non-standard concrete fill available engineering practical application. It is recommended to use the local gravity retaining wall, backfill material, all kinds of structures dorsal (back) fill material, the following industries 4M lane roads, farm roads of rigid pavements, squares, sidewalks and pavement controlled Low strength material (CLSM). To do so, it can achieve a natural collapse (silt) fill material reuse, and reduce construction costs and solve engineering natural collapse (silt) fill spot problems, and can reduce the debris clearance and reservoir dredging expenditures.
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